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Anselmo S, Cataldo S, Avola T, Sancataldo G, D'Oca MC, Fiore T, Muratore N, Scopelliti M, Pettignano A, Vetri V. Lead(II) ions adsorption onto amyloid particulates: An in depth study. J Colloid Interface Sci 2021; 610:347-358. [PMID: 34923272 DOI: 10.1016/j.jcis.2021.11.184] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 11/24/2021] [Accepted: 11/28/2021] [Indexed: 01/08/2023]
Abstract
The production of new cost-effective biocompatible sorbent sustainable materials, with natural origins, able to remove heavy metals from water resources is nowadays highly desirable in order to reduce pollution and increase clean water availability. In this context, self-assembled protein materials with amyloid structures seem to have a great potential as natural platform for a broader development of highly-tunable structures. In this work we show how protein particulates, a generic form of protein aggregates, with spherical micro sized shape can be used as adsorbents of Pb2+ ions from aqueous solution. The effect of pH, ionic medium, ionic strength and temperature of the metal ion solution on the adsorption ability and affinity has been evaluated revealing the complexity of adsorption mechanisms which are the result of the balance of specific interactions with functional groups in protein structure and not specific ones common to all polypeptide chains, and possibly related to amyloid state and to modification of particulates hydration layer.
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Affiliation(s)
- Sara Anselmo
- Dipartimento di Fisica e Chimica - Emilio Segrè, Università di Palermo, Viale delle Scienze, Palermo I-90128, Italy
| | - Salvatore Cataldo
- Dipartimento di Fisica e Chimica - Emilio Segrè, Università di Palermo, Viale delle Scienze, Palermo I-90128, Italy
| | - Tiziana Avola
- Dipartimento di Fisica e Chimica - Emilio Segrè, Università di Palermo, Viale delle Scienze, Palermo I-90128, Italy
| | - Giuseppe Sancataldo
- Dipartimento di Fisica e Chimica - Emilio Segrè, Università di Palermo, Viale delle Scienze, Palermo I-90128, Italy
| | - Maria Cristina D'Oca
- Dipartimento di Fisica e Chimica - Emilio Segrè, Università di Palermo, Viale delle Scienze, Palermo I-90128, Italy
| | - Tiziana Fiore
- Dipartimento di Fisica e Chimica - Emilio Segrè, Università di Palermo, Viale delle Scienze, Palermo I-90128, Italy
| | - Nicola Muratore
- Dipartimento di Fisica e Chimica - Emilio Segrè, Università di Palermo, Viale delle Scienze, Palermo I-90128, Italy
| | - Michelangelo Scopelliti
- Dipartimento di Fisica e Chimica - Emilio Segrè, Università di Palermo, Viale delle Scienze, Palermo I-90128, Italy
| | - Alberto Pettignano
- Dipartimento di Fisica e Chimica - Emilio Segrè, Università di Palermo, Viale delle Scienze, Palermo I-90128, Italy.
| | - Valeria Vetri
- Dipartimento di Fisica e Chimica - Emilio Segrè, Università di Palermo, Viale delle Scienze, Palermo I-90128, Italy.
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2
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Sakpal SS, Ghosh D, Manae MA, Hazra A, Bagchi S. The Curious Case of Aqueous Warfarin: Structural Isomers or Distinct Excited States? J Phys Chem B 2021; 125:2871-2878. [PMID: 33728913 DOI: 10.1021/acs.jpcb.0c10824] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Warfarin is a potent anti-coagulant drug and is on the World Health Organization's List of Essential Medicines. Additionally, it displays fluorescence enhancement upon binding to human serum albumin, making warfarin a prototype fluorescent probe in biology. Despite its biological significance, the current structural assignment of warfarin in aqueous solution is based on indirect evidence in organic solvents. Warfarin is known to exist in different isomeric forms-open-chain, hemiketal, and anionic forms-based on the solvent and pH. Moreover, warfarin displays a dual absorption feature in several solvents, which has been employed to study the ring-chain isomerism between its open-chain and hemiketal isomers. In this study, our pH-dependent experiments on warfarin and structurally constrained warfarin derivatives in aqueous solution demonstrate that the structural assignment of warfarin solely on the basis of its absorption spectrum is erroneous. Using a combination of steady-state and time-resolved spectroscopic experiments, along with quantum chemical calculations, we assign the observed dual absorption to two distinct π → π* transitions in the 4-hydroxycoumarin moiety of warfarin. Furthermore, we unambiguously identify the isomeric form of warfarin that binds to human serum albumin in aqueous buffer.
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Affiliation(s)
- Sushil S Sakpal
- Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory, Pune 411008, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Deborin Ghosh
- Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory, Pune 411008, India
| | - Meghna A Manae
- Department of Chemistry, Indian Institute of Science Education and Research, Pune 411008, India
| | - Anirban Hazra
- Department of Chemistry, Indian Institute of Science Education and Research, Pune 411008, India
| | - Sayan Bagchi
- Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory, Pune 411008, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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3
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Shimizu S, Abbott S, Adamska K, Voelkel A. Quantifying non-specific interactions via liquid chromatography. Analyst 2019; 144:1632-1641. [PMID: 30644458 DOI: 10.1039/c8an02244e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Determinations of solute-cosolute interactions from chromatography have often resulted in problems, such as the "antibinding" (or a negative binding constant) between the solute and micelle in micellar liquid chromatography (MLC) or indeterminacy of salt-ligand binding strength in high-performance affinity chromatography (HPAC). This shows that the stoichiometric binding models adopted in many chromatographic analyses cannot capture the non-specific nature of solvation interactions. In contrast, an approach using statistical thermodynamics handles these complexities without such problems and directly links chromatographic data to, for example, solubility data via a universal framework based on Kirkwood-Buff integrals (KBI) of the radial distribution functions. The chromatographic measurements can now be interpreted within this universal theoretical framework that has been used to rationalize small solute solubility, biomolecular stability, binding, aggregation and gelation. In particular, KBI analysis identifies key solute-cosolute interactions, including excluded volume effects. We present (i) how KBI can be obtained directly from the cosolute concentration dependence of the distribution coefficient, (ii) how the classical binding model, when used solely as a fitting model, can yield the KBIs directly from the literature data, and (iii) how chromatography and solubility measurements can be compared in the unified theoretical framework provided via KBIs without any arbitrary assumptions about the stationary phase. To perform our own analyses on multiple datasets we have used an "app". To aid readers' understanding and to allow analyses of their own datasets, the app is provided with many datasets and is freely available on-line as an open-source resource.
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Affiliation(s)
- Seishi Shimizu
- York Structural Biology Laboratory, Department of Chemistry, University of York, Heslington, York YO10 5DD, UK.
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4
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Harandi SE, Banerjee PC, Easton CD, Singh Raman RK. Influence of bovine serum albumin in Hanks' solution on the corrosion and stress corrosion cracking of a magnesium alloy. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 80:335-345. [PMID: 28866172 DOI: 10.1016/j.msec.2017.06.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Revised: 12/23/2016] [Accepted: 06/07/2017] [Indexed: 10/19/2022]
Abstract
It is essential for any temporary implant to possess adequate strength to maintain their mechanical integrity under the synergistic effects of mechanical loading characteristics of human body and the corrosive physiological environment. Such synergistic effects can cause stress corrosion cracking (SCC). The aim of the present study is to investigate the effect of the addition of bovine serum albumin (BSA) to Hanks' solution in corrosion and SCC susceptibility of AZ91D magnesium alloy. The electrochemical impedance spectroscopy (EIS) results indicated that the addition of BSA increased corrosion resistance of the alloy during the first 48h of immersion and then decreased it rapidly. The energy-dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS) analyses indicated adsorption of BSA on the alloy surface during initial hours of immersion. However, with the increasing immersion time, BSA chelated with the corrosion products causing disruption of the protective film; thus, it accelerated the corrosion of the alloy. Both the mechanical data and fractographic evidence have confirmed susceptibility of the alloy to SCC. However, in the presence of BSA, the alloy suffered greater SCC which was attributed to its increased susceptibility towards localized corrosion.
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Affiliation(s)
- Shervin Eslami Harandi
- Department of Mechanical and Aerospace Engineering, Monash University, Melbourne, Victoria, Australia
| | | | | | - R K Singh Raman
- Department of Mechanical and Aerospace Engineering, Monash University, Melbourne, Victoria, Australia; Department of Chemical Engineering, Monash University, Melbourne, Victoria, Australia.
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5
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Ali MS, Amina M, Al-Lohedan HA, Al Musayeib NM. Elucidation of the interaction of human serum albumin with anti-cancer sipholane triterpenoid from the Red Sea sponge. LUMINESCENCE 2016; 32:223-230. [DOI: 10.1002/bio.3172] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2016] [Revised: 04/13/2016] [Accepted: 05/16/2016] [Indexed: 01/05/2023]
Affiliation(s)
- Mohd. Sajid Ali
- Department of Chemistry, College of Science; King Saud University; P.O. Box 2455 Riyadh 11451 Arriyadh Saudi Arabia
| | - Musarat Amina
- Department of Pharmacognosy, College of Pharmacy; King Saud University; P.O. Box 2457 Riyadh 11451 Arriyadh Saudi Arabia
| | - Hamad A. Al-Lohedan
- Department of Chemistry, College of Science; King Saud University; P.O. Box 2455 Riyadh 11451 Arriyadh Saudi Arabia
| | - Nawal M. Al Musayeib
- Department of Pharmacognosy, College of Pharmacy; King Saud University; P.O. Box 2457 Riyadh 11451 Arriyadh Saudi Arabia
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6
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Pisoni DS, Todeschini L, Borges ACA, Petzhold CL, Rodembusch FS, Campo LF. Symmetrical and asymmetrical cyanine dyes. Synthesis, spectral properties, and BSA association study. J Org Chem 2014; 79:5511-20. [PMID: 24845528 DOI: 10.1021/jo500657s] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
New cyanines were prepared by an efficient and practical route with satisfactory overall yield from low-cost starting materials. The photophysical behavior of the cyanines was investigated using UV-vis and steady-state fluorescence in solution, as well as their association with bovine serum albumin (BSA) in phosphate buffer solution (PBS). No cyanine aggregation was observed in organic solvents or in phosphate buffer solution. The alkyl chain length in the quaternized nitrogen was shown to be fundamental for BSA detection in PBS in these dyes.
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Affiliation(s)
- Diego S Pisoni
- Instituto de Quı́mica, Universidade Federal do Rio Grande do Sul , Avenida Bento Gonçalves, 9500, CP 15003. CEP 91501-970, Porto Alegre-RS, Brazil
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7
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Beckford G, Owens E, Henary M, Patonay G. The solvatochromic effects of side chain substitution on the binding interaction of novel tricarbocyanine dyes with human serum albumin. Talanta 2012; 92:45-52. [DOI: 10.1016/j.talanta.2012.01.029] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2012] [Accepted: 01/13/2012] [Indexed: 11/26/2022]
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8
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Edwie F, Li Y, Chung TS. Exploration of regeneration and reusability of human serum albumin as a stereoselective ligand for chiral separation in affinity ultrafiltration. J Memb Sci 2010. [DOI: 10.1016/j.memsci.2010.07.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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9
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Ni Y, Liu G, Kokot S. Fluorescence Spectrometric Study on the Interactions of Terazosin Hydrochloride and Prazosin Hydrochloride with Bovine Serum Albumin Using Warfarin and Diazepam as Site Markers. ANAL LETT 2009. [DOI: 10.1080/00032710903243653] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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10
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Ibrahim F, André C, Thomassin M, Guillaume YC. Association mechanism of four acetylcholinesterase inhibitors (AChEIs) with human serum albumin: a biochromatographic approach. J Pharm Biomed Anal 2008; 48:1345-50. [PMID: 18996666 DOI: 10.1016/j.jpba.2008.09.029] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2007] [Revised: 09/12/2008] [Accepted: 09/15/2008] [Indexed: 11/27/2022]
Abstract
In this work, the interaction of a series of acetylcholinesterase inhibitors (AChEIs; donepezil, galanthamine, huperzine and neostigmine) with human serum albumin (HSA) immobilized on porous silica particles was studied using a biochromatographic approach. For all the tested AChEI molecules, linear retention plots were observed at all temperatures. An analysis of the thermodynamics (i.e. enthalpy (DeltaH degrees ), entropy ((S degrees *)) of the interaction of the AChEI molecules with the immobilized human serum albumin was also carried out. The (H degrees and (S degrees * values for donepezil, galanthamine and neostigmine, were negative due to van der Waals interactions and hydrogen bonding which govern this association with albumin. Whereas the positive values of (H degrees and (S degrees * of huperzine binding on HSA indicated a predominance of hydrophobic interactions. The association of AChEIs with HSA was increased linearly with pH. A comparative thermodynamic study with benzodiazepine molecules was also done to determine the potential binding site of these drugs on HSA.
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Affiliation(s)
- Firas Ibrahim
- Equipe des Sciences Séparatives et Biopharmaceutiques (2SB/EA-3924), Laboratoire de Chimie Analytique, Faculté de Médecine Pharmacie, Université de Franche-Comté, Place Saint Jacques, 25030 Besançon Cedex, France
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11
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Ibrahim F, Guillaume YC, André C. Chromatographic Framework to Determine the Memantine Binding Mechanism on Human Serum Albumin Surface. Chromatographia 2008. [DOI: 10.1365/s10337-008-0675-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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12
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Kessel D, Price M, Reiners JJ. The Bcl-2 antagonist HA14-1 forms a fluorescent albumin complex that can be mistaken for several oxidized ROS probes. Photochem Photobiol 2008; 84:1272-6. [PMID: 18513234 DOI: 10.1111/j.1751-1097.2008.00371.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The proapoptotic effects of the Bcl-2 antagonist HA14-1 are believed to derive from its affinity for the hydrophobic groove on Bcl-2 and Bcl-x(L), thereby displacing proapoptotic factors, e.g. Bax and Bak. We have reported that HA14-1 promotes the efficacy of low-dose photodynamic therapy (PDT). A recent report proposed that the proapoptotic activity of HA14-1 reflects its ability to generate reactive oxygen species (ROS) when incubated in an aqueous environment. This later study, like several other HA14-1 investigations, relied on the use of fluorescent probes for ROS detection. We found that HA14-1 reacts with the albumin in serum to yield a fluorescent product. After correcting for this effect, the putative formation of ROS by HA14-1 could not be demonstrated with the fluorescent probes H(2)DCFDA, dihydroethidium or dihydrorhodamine. Indeed, the fluorescence excitation/emission spectra of HA14-1 encompassed the excitation/emission wavelengths used to detect these ROS probes. Cells cultured in a medium supplemented with ovalbumin, instead of serum, underwent apoptosis following HA14-1 addition, but did not exhibit fluorescence. Hence, HA14-1 fluorescence was unrelated to its proapoptotic activity. We conclude that the enhancement of PDT by HA14-1 reflects a pharmacologic effect, rather than its direct contribution of ROS.
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Affiliation(s)
- David Kessel
- Department of Pharmacology, Wayne State University School of Medicine, Detroit, MI, USA.
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13
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Banerjee D, Pal SK. Molecular Recognition in Partially Folded States of a Transporter Protein: Temperature-dependent Specificity of Bovine Serum Albumin. Photochem Photobiol 2008; 84:750-7. [DOI: 10.1111/j.1751-1097.2007.00252.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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14
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Ni Y, Zhang X, Kokot S. Spectrophotofluorimetric Study of the Interaction between Trazodone Hydrochloride and Bovine Serum Albumin. ANAL LETT 2007. [DOI: 10.1080/00032710701589000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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15
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Claude Guillaume Y, Thanh Truong T, Peyrin E, Nicod L, Xicluna A, François Robert J, Thomassin M, Millet J. Viscosity‐Temperature Dependence on DNA Stretching: Slalom Chromatography Study. J LIQ CHROMATOGR R T 2007. [DOI: 10.1081/jlc-120018890] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Yves Claude Guillaume
- a Laboratoires de Chimie Analytique , Universite de Franche‐Comte, Faculté de Médecine et de Pharmacie de Besançon , Place Saint Jacques, 25030 , Besançon , Cedex , France
| | - Tong Thanh Truong
- a Laboratoires de Chimie Analytique , Universite de Franche‐Comte, Faculté de Médecine et de Pharmacie de Besançon , Place Saint Jacques, 25030 , Besançon , Cedex , France
| | - Eric Peyrin
- a Laboratoires de Chimie Analytique , Universite de Franche‐Comte, Faculté de Médecine et de Pharmacie de Besançon , Place Saint Jacques, 25030 , Besançon , Cedex , France
| | - Laurence Nicod
- b Laboratoires de Biologie Cellulaire , Universite de Franche‐Comte, Faculté de Médecine et de Pharmacie de Besançon , Besançon , France
| | - Alain Xicluna
- c Laboratoires de Chimie Thérapeutique , Universite de Franche‐Comte, Faculté de Médecine et de Pharmacie de Besançon , Besançon , France
| | - Jean François Robert
- d Laboratoires de Chimie Organique , Universite de Franche‐Comte, Faculté de Médecine et de Pharmacie de Besançon , Besançon , France
| | - Mireille Thomassin
- a Laboratoires de Chimie Analytique , Universite de Franche‐Comte, Faculté de Médecine et de Pharmacie de Besançon , Place Saint Jacques, 25030 , Besançon , Cedex , France
| | - Joelle Millet
- e Laboratoires de Galénique , Universite de Franche‐Comte, Faculté de Médecine et de Pharmacie de Besançon , Besançon , France
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16
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Wei Y, Dong C, Liu D, Shuang S, Huie CW. Enantioselective Quenching of Room-Temperature Phosphorescence Lifetimes of Proteins: Bovine and Human Serum Albumins. Biomacromolecules 2007; 8:761-4. [PMID: 17274655 DOI: 10.1021/bm0610121] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Enantioselective quenching of the room-temperature phosphorescence (RTP) lifetime of proteins was demonstrated due to the effects of various external chiral quenching agents. In the absence of quenchers, the RTP lifetimes for bovine serum albumin (BSA) and human serum albumin (HSA) were found to be 5.0 +/- 0.2 and 4.0 +/- 0.1 ms, respectively. The addition of various chiral quenchers (three pairs of binaphthols and two pairs of beta-blockers) into the deoxygenated sample solutions containing BSA and HSA reduced their RTP lifetimes significantly, i.e., from ca. 4-5 ms (in the absence) to an average lifetime of ca. 1-2 ms (in the presence) of the chiral quenchers. For the R and S enantiomers examined, marked differences in RTP lifetimes were observed, i.e., ranging from ca. 20-29% for the binaphthols to ca.14-16% for the beta-blockers. Such findings could lead to a better understanding of the relationship between chirality, dynamics/conformational changes, and biological functions of proteins.
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Affiliation(s)
- Yanli Wei
- Research Center of Environmental Science and Engineering, College of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, 030006, People's Republic of China
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17
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Ding GS, Huang XJ, Liu Y, Wang JD. Chiral Separation of Racemates of Drugs and Amino Acid Derivatives by High-Performance Liquid Chromatography on a Norvancomycin-Bonded Chiral Stationary Phase. Chromatographia 2004. [DOI: 10.1365/s10337-004-190-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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18
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André C, Guillaume YC. Anti-coagulant rodenticide binding properties of human serum albumin: a biochromatographic approach. J Chromatogr B Analyt Technol Biomed Life Sci 2004; 801:221-7. [PMID: 14751790 DOI: 10.1016/j.jchromb.2003.11.023] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
In this paper, the anti-coagulant rodenticide-human serum albumin (HSA) binding was investigated using a perturbation method to calculate the solute distribution isotherms. It was shown that rodenticide can bound either on the benzodiazepine HSA site with low affinity (site I) or on the warfarin HSA site with high affinity (site II). The thermodynamic parameters of this association were calculated for the two HSA binding sites. For the site II, the rodenticide-HSA association was governed enthalpically whereas for the site I, this one was driven entropically. Moreover, the role of the magnesium (Mg(2+)) and calcium (Ca(2+)) on this association was carried out. It was clearly demonstrated that the rodenticide affinity for the site I was not affected by modifying the bulk solvent surface tension whereas for the site II the association constant increased strongly with the Mg(2+) or the Ca(2+) concentration in the bulk solvent. These results showed that the rodenticide-HSA affinity and thus the rodenticide toxicological effect depends on the Mg(2+) or Ca(2+) concentration.
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Affiliation(s)
- Claire André
- Laboratoire de Chimie Analytique, Faculté Médecine Pharmacie, Universite de Franche-Comte, Place Saint-Jacques, 25030 Cedex, Besançon, France
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19
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André C, Berthelot A, Robert JF, Thomassin M, Guillaume YC. Testimony of the correlation between DHEA and bioavailable testosterone using a biochromatographic concept: effect of two salts. J Pharm Biomed Anal 2003; 33:911-21. [PMID: 14656582 DOI: 10.1016/s0731-7085(03)00428-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
In a previous paper (C. André et al., submitted to J. Chromatogr. B) a mathematical model based on the Langmuir theory was developed to visualize the competition effect between testosterone and deshydroepiandrosterone (DHEA) for their identical human serum albumin (HSA) binding cavity. In this work, the thermodynamic mechanisms of (i) the binding of two hormones, DHEA and testosterone to HSA and (ii) the testosterone displacement of its HSA binding cavity by DHEA was studied by biochromatography. The Na+ cation effect used as physico-chemical marker of these binding processes was clearly described. The Gibbs free energy value (DeltaGo ) of the displacement equilibrium was always negative demonstrating that DHEA well displaced testosterone of its HSA binding cavity. The thermodynamic data also showed that this displacement equilibrium was enthalpically controlled. Moreover, the effect of (Mg2+) concentration (x') on the two binding mechanisms was analyzed. It appeared that for old men with a deficit of testosterone, Mg(2+) supplementation during treatment with DHEA can increased the free testosterone concentration and its biological effect. All these results must be confirmed by in vivo test.
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Affiliation(s)
- Claire André
- Equipe des Sciences Séparatives et Biopharmaceutiques (2SB), Laboratoire de Chimie Analytique, Faculté de Médecine et de Pharmacie, Place Saint-Jacques, 25030 Besançon cedex, France
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20
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Effect of sodium chloride on herbicide-fluorinated stationary phase association-Evidence of a dual mechanism. Chromatographia 2003. [DOI: 10.1007/bf02491764] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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21
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Ismaili L, André C, Nicod L, Truong TT, Millet J, Thomassin M, Cavalli E, Chaumont JP, Xicluna A, Guillaume YC. Triazine-human serum albumin association: thermodynamic approach and sodium effect. J Chromatogr B Analyt Technol Biomed Life Sci 2002; 780:467-74. [PMID: 12401375 DOI: 10.1016/s1570-0232(02)00615-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Human serum albumin (HSA) serves as a carrier protein to transport triazine herbicides to molecular targets. In this paper, a theoretical treatment was developed to describe the HSA-triazine herbicides association. A determination of the association constant, K, as well as the degree of complexation n(c) (the percent of complex guest) was carried out. Enthalpy-entropy compensation was also analyzed in relation to this mathematical model to confirm the herbicide complexation behavior with HSA. The role of the sodium cation (Na(+)) on this association was investigated. It was expected that the sodium ion would act on the herbicide-HSA association process by modifying the surface tension of the bulk solvent and increase the K and n(c) values. The results showed that for patients who suffer from Na(+) desequilibrium, the triazine-HSA binding would change and as well the toxicological effect of these herbicides.
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Affiliation(s)
- Lhassane Ismaili
- Laboratoire de la Chimie Analytique, Faculté de Médecine-Pharmacie, Université de Franche-Comte, Place Saint Jacques, 25030 Besançon Cedex, France
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Haroun M, Dufresne C, Jourdan E, Ravel A, Grosset C, Villet A, Peyrin E. Salt effects on the interaction of an amphiphilic model molecule with immobilized phosphatidylcholine monolayers. J Chromatogr A 2002; 977:185-92. [PMID: 12456108 DOI: 10.1016/s0021-9673(02)01352-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The retention of hydrocortisone (used as an amphiphilic model solute) on an immobilized artificial membrane (IAM) column was investigated in relation to the mobile phase concentration of three sodium salts (representing different rankings in the Hofmeister series, i.e. perchlorate, chloride and sulfate) in order to provide insight into the nature of the solute interactions with phospholipid monolayers. The influence of the salt series on solute retention was found to follow the Hofmeister series, emphasizing the role of hydrophobic effect in the solute retention mechanism on phospholipid monolayers. Retention models based on the extended Wyman relations (preferential interaction theory) were developed to analyze more quantitatively the salt effects on the hydrocortisone retention factor. This analysis as well as additional thermodynamic study suggested that the hydrocortisone binding to IAM involved both an insertion into the hydrophobic inside governed by hydrophobic effects and contacts with the interfacial region implying interactions such as van der Waals interactions/hydrogen bonds between the solute hydroxyl groups and the polar headgroups of phospholipidmonolayers.
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Guillaum YC, Millet J, Nicod L, Truong-Than T, Guinchard C, Xicluna A, Thomassin M. Solute complexation degree with human serum albumin: biochromatographic approach. J Chromatogr B Analyt Technol Biomed Life Sci 2002; 768:121-7. [PMID: 11939545 DOI: 10.1016/s0378-4347(01)00490-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
A mathematical model was developed for the study of the D,L-dansylamino acid retention mechanism in reversed-phase liquid chromatography using a C18 column as a stationary phase and human serum albumin (HSA) as an eluent modifier. The solute retention factor is dependent on the HSA concentration in the eluent as well as the binding constant of the guest-HSA complex. A determination of the degree of complexation n(c) (the percent of the complexed guest) could be carried out. Different Van 't Hoff plot shapes of the degree of complexation were observed with different eluent pH, confirming a change in the solute complexation mechanism for physiological pH (between 7-7.5). Enthalpy-entropy compensation was also analysed in relation to this mathematical model to confirm the solute complexation behavior with HSA. These results finally confirmed that at physiological pH and temperature (approximately 35 degrees C) values the HSA was in a favorable structural conformation for its binding with a great majority of drugs.
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Affiliation(s)
- Y C Guillaum
- Laboratoire de Chimie Analytique, Faculté de Médecine et de Pharmacie, Place Saint-Jacques, Besançon, France.
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Hage DS. High-performance affinity chromatography: a powerful tool for studying serum protein binding. J Chromatogr B Analyt Technol Biomed Life Sci 2002; 768:3-30. [PMID: 11939555 DOI: 10.1016/s0378-4347(01)00482-0] [Citation(s) in RCA: 173] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
High-performance affinity chromatography (HPAC) is a method in which a biologically-related ligand is used as a stationary phase in an HPLC system. This approach is a powerful means for selectively isolating or quantitating agents in complex samples, but it can also be employed to study the interactions of biological systems. In recent years there have been numerous reports in which HPAC has been used to examine the interactions of drugs, hormones and other substances with serum proteins. This review discusses how HPAC has been used in such work. Particular attention is given to the techniques of zonal elution and frontal analysis. Various applications are provided for these techniques, along with a list of factors that need to be considered in their optimization and use. New approaches based on band-broadening studies and rapid immunoextraction are also discussed.
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Affiliation(s)
- David S Hage
- University of Nebraska-Lincoln, Department of Chemistry, 68588-0304, USA.
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25
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Chiral discrimination of phenoxypropionic acid herbicides on teicoplanin phase: Effect of mobile phase modifier. Chromatographia 2002. [DOI: 10.1007/bf02492134] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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26
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Slama I, Ravelet C, Grosset C, Ravel A, Villet A, Nicolle E, Peyrin E. A framework based on the extended Wyman concept for analyzing the salt effects on the solute retention in high-performance affinity chromatography. Anal Chem 2002; 74:282-7. [PMID: 11795807 DOI: 10.1021/ac010696u] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The analysis of binding data of a ligand to a macromolecule in the presence of an additive can be classically formulated in terms of the linked functions of Wyman. In the case of a salt, this approach has been extended by Tanford such that the contributions of both salt and water are taken into account. In this paper, the extended Wyman theory was applied to high-performance affinity chromatography (HPAC) in order to define a general model describing the effects of the mobile-phase salts on the ligand binding. Various HPAC literature data, as well as our data concerning dansyl amino acid retention on a vancomycin stationary phase, were examined in relation to this model. From the results, this theoretical approach was considered to be adequate to describe accurately the salt dependence on solute retention. This work shows the importance of taking into account the effects of both ionic species and water in the investigation of relative contributions of the interactions involved in the ligand binding to immobilized receptor.
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Affiliation(s)
- Ines Slama
- Laboratoire de Chimie Analytique, UFR de Pharmacie de Grenoble, UJF, Domaine de la Merci, La Tronche, France
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Peyri E, Ravelet C, Nicolle E, Villet A, Grosset C, Ravel A, Alary J. Dansyl amino acid enantiomer separation on a teicoplanin chiral stationary phase: effect of eluent pH. J Chromatogr A 2001; 923:37-43. [PMID: 11510557 DOI: 10.1016/s0021-9673(01)00973-6] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The retention and separation of a series of D,L dansyl amino acids (used as test solutes) on a teicoplanin stationary phase were investigated over a wide range of mobile phase (citrate buffer-methanol, 90:10, v/v) pH. An approach based on the development of various equilibria was carried out in order to describe the retention behavior of the solute in the chromatographic system. The equilibrium constants corresponding to the transfer of the anionic and zwitterionic forms of the dansyl amino acids from the mobile to the stationary phase were determined. These values allowed one to explain the decrease in the retention factor and the associated increase in the separation factor as the eluent pH was increased. Thermodynamic parameter variations were calculated so that the driving forces of the solute association with the teicoplanin phase were derived. This approach indicated that the chiral discrimination was principally controlled by the interaction between the anionic form of the solute and the stationary phase.
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Affiliation(s)
- E Peyri
- Laboratoire de Chimie Analytique, Faculté de Pharmacie, Domaine de la Merci, La Tronche, France.
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28
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Interactions between D,L dansyl amino acids and immobilized teicoplanin: Study of the dual effect of sodium citrate on chiral recognition. Chromatographia 2001. [DOI: 10.1007/bf02493013] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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29
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Use of chromatography to investigate biological recognition of a ligand by human serum albumin. Chromatographia 2001. [DOI: 10.1007/bf02491611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Abstract
Protein interactions are important in determining the transport, metabolism and/or activity of many chiral compounds within the body. This review examines data that have been obtained on these interactions by various chromatographic and electrophoretic methods, especially those based on either high-performance liquid chromatography or capillary electrophoresis. Zonal elution, frontal analysis and vacancy methods are each considered, as are approaches that employ either soluble or immobilized proteins. There are a variety of different items that can be learned about a solute-protein system through these techniques. This includes information on the binding constants and number of binding sites for a solute-protein system, as well as the thermodynamic parameters, rate constants, interaction forces and binding site structure for the protein and solute. Numerous examples are provided throughout this review, as taken from the literature and from work performed within the author's laboratory.
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Affiliation(s)
- D S Hage
- Department of Chemistry, University of Nebraska--Lincoln, 68588-0304, USA.
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Use of the Na+ ion as an RPLC retention marker to investigate the association of dansyl amino acids with permethylated β-CD. Chromatographia 2000. [DOI: 10.1007/bf02491001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Guillaume YC, Guinchard C, Robert JF, Berthelot A. Ionic binding of human serum albumin — dependence on pH and ionic strength: a chromatographic approach. Chromatographia 2000. [DOI: 10.1007/bf02789753] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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34
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Peyrin E, Guillaume YC, Grosset C, Ravel A, Villet A, Garrel C, Alary J, Favier A. Mobile-phase-viscosity dependence on DNA separation in slalom chromatography. J Chromatogr A 2000; 886:1-7. [PMID: 10950270 DOI: 10.1016/s0021-9673(00)00510-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Slalom chromatography (SC) is an alternative chromatographic procedure for the separation of relatively large double-stranded DNA molecules and is based on a new principle. The retardation of the DNA fragments from the cleavage of the Lambda DNA by the KpnI restriction enzyme was studied using an acetonitrile-phosphate buffer as a mobile phase with various concentrations of viscosity modifier (i.e. glycerol) and a C1 column as a stationary phase. The DNA molecule retention was accurately described over the glycerol concentration range using a model previously established. It was shown that the eluent viscosity increase enhanced the slalom chromatographic capacity to separate the DNA fragments. A connection between SC and 'hydrodynamic chromatography' processes was predicted to link the two processes in a global separation mechanism based on a non-equilibrium principle.
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Affiliation(s)
- E Peyrin
- Laboratoire de Chimie Analytique, UFR de Pharmacie, Domaine de la Merci, La Tronche, France
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